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  • Saturday, December 1, 2018 12:00 AM
    One very significant change that took place in our industry occurred when manufacturers chose to place the TCM inside the transmission. By minimizing the amount of wires going to the transmission, it saved them a considerable amount of money. However, for us in the repair and rebuild industry, this can be frustrating from both a diagnostic and cost standpoint, especially when the solenoids are integral to the TCM. And/or when programming is essential to complete the repair correctly and efficiently.
  • Leeward Tech: Ins and Outs of Torque Converters
    Saturday, December 1, 2018 12:00 AM
    Inside the converter
    Plotting the pathways of the oil that enters and exits the converter is not an easy task if you are only looking at the parts of the converter. Adding a stator support and an input shaft to the converter parts makes this task somewhat easier.
  • Tech to Tech: Intermittent No Start Camry Woes
    Saturday, December 1, 2018 12:00 AM
    I just couldn’t resist. It was just the detective in me.
    “Yes, I will take a look at it,” I said to a new customer when she said her car would stall but only occasionally.
  • Technically Speaking: When it is Broken
    Saturday, December 1, 2018 12:00 AM
    Planetary gear sets and their operation are unappealing for many. Know what is turning and what is holding for each gear can challenge one’s thinking. Particularly so when there are 10 speeds and 3 planetary gear sets involved. I actually enjoy pushing my mind to visualize powerflow and indeed, it can be challenging at times. But it sure does go a long way when trying to isolate a noise problem. It also helps when you have missing gears or no movement. This too helps to know where to look. A perfect example of this is in the Technically Speaking column back in December 2017.
  • R&R Tech: The Jeep Patriot with a really bad rolling surge
    Saturday, December 1, 2018 12:00 AM
    Sometimes despite your best efforts you can still manage to shoot yourself in the foot. The following account is a prime example: While this happened on one specific vehicle, it could happen on any number of vehicles where the cause is the same, but could have different end results.
    One of our shop locations had a 2011 Jeep Patriot that came in on the back of a tow truck. The customer stated that it started making noise and then quit moving. This one was an easy checkout; the vehicle didn’t move in any direction, had metallic-looking fluid, a horrendous bearing noise, and had a P0777 (secondary pressure control solenoid stuck on) code stored. Even though this one was pretty much a slam dunk in the way of diagnosis, we still needed to go through our complete evaluation procedure.
  • TASC Force Tips: Friendly Rivalry Builds Success
    Saturday, December 1, 2018 12:00 AM
    Competition and rivalry have been instrumental to technological development throughout the history of motor vehicles. Car manufacturers are always trying to one-up their competitors, whether it be with greater fuel efficiency, speed, interior features, etc. These advances are then made available to the consumer – at a cost. Keeping this cost to a minimum is the most challenging aspect of development; after all, engineering, building prototypes, testing and re-tooling are all very costly. But what if two companies could pool resources and split the savings?
  • Leeward Tech: Ins and Outs of Torque Converters
    Thursday, November 1, 2018 12:00 AM
    Ed Lee presents a two-part project about the ins and outs of torque converters, starting with the outs.
  • Technically Speaking: Very Odd Issues
    Thursday, November 1, 2018 12:00 AM
    Wayne Colonna illustrates the odd issues that pop up with valve body bolt lengths with an example of Toyota’s U660.
  • TASC Force Tips: ZF8HP55 transmission
    Thursday, November 1, 2018 12:00 AM
    Sonnax has a set of vacuum diagrams for the ZF8HP55 transmission.
  • RR Tech: What is that Unpleasant Grinding Noise?
    Thursday, November 1, 2018 12:00 AM
    John Griffin confronts a 5R55E unit with oil-pan bolts wiggling such that the pan is shifted past the mating surface of the block.
Beyond the missions of providing education and reference materials, Transmission Digest serves as a prime resource used as shops find the parts, supplies and services necessary for successful and profitable operation. Nine of the 12 issues published each year are focused on the products, services and suppliers relating to a specific profit center within the retail shop.

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